In order to bring a nearby object into focus, several changes must occur in both the external and internal muscles of the eyes. The initial stimulus for accommodation is a blurred visual image that first reaches the visual cortex. Through a series of cortical connections, the blurred image reaches two specialized motor centres. One of these, located in the frontal cortex, sends motor commands......

The second approach is based on the work of Swiss psychologist Jean Piaget, who viewed cognitive adaptation in terms of two basic processes: assimilation and accommodation. Assimilation is the process of interpreting reality in terms of a person’s internal model of the world (based on previous experience); accommodation represents the changes one makes to that model through the process of.....

...already possesses. A five-year-old who has a concept of a bird as a living thing with a beak and wings that flies will try to assimilate the initial perception of an ostrich to his concept of bird. Accommodation, the second process, occurs when the information presented does not fit the existing concept. Thus, once the child learns that the ostrich does not fly, he will accommodate to that fact...

...by the accents of the words. Accompaniment, usually by continuo (cello and harpsichord), is simple and chordal. The melody approximates speech by using only a few pitches. The second variety, recitativo stromentato, or accompanied recitative, has stricter rhythm and more involved, often orchestral accompaniment. Used at dramatically important moments, it is more emotional in character.......

in music, auxiliary part or parts of a composition designed to support the principal part or to throw it into relief. In secular medieval music and in much folk and non-European music, instrumental accompaniments for singers consist of unison or octave duplications of the melody (sometimes with slight differences, creating heterophony, the simultaneous performance of variant versions of the same ...

in law, a person who becomes equally guilty in the crime of another by knowingly and voluntarily aiding the other to commit the offense. An accomplice is either an accessory or an abettor. The accessory aids a criminal prior to the crime, whereas the abettor aids the offender during the crime itself....

...immediately banned, as was the second, shortened edition, A Common-wealth of Good Counsaile (1607). In 1733 a more nearly correct translation by William Oldisworth appeared under the title The Accomplished Senator. Opposing absolute monarchy and supremacy of the people, Goślicki recommended that the senate should stand between the sovereign and the people, controlling the.....

Italian woman whose life story aroused a great deal of contemporary interest and was later the basis for a play by John Webster, The White Devil (1612), and for a novel by Ludwig Tieck, Vittoria Accorombona (1840)....

...an advanced compound vortex controlled combustion (CVCC) chamber, which easily met American emissions standards at a time when American manufacturers were arguing that it was impossible. Honda’s Accord model, introduced in 1976, offered refinement and economy superior to comparable American models, albeit at a slightly higher price. The Accord was an immediate hit and resulted in......

...recognized to be superior to the Lancastrian title through the junior male line of Henry VI. York himself was designated heir to the throne when Henry V died. However, this settlement, the Act of Accord, was resisted, and York was killed attempting to enforce it at Wakefield (now West Yorkshire) on December 30, 1460. This setback was reversed by York’s eldest son, Edward, who......

free-reed portable musical instrument, consisting of a treble casing with external piano-style keys or buttons and a bass casing (usually with buttons) attached to opposite sides of a hand-operated bellows....

free-reed portable musical instrument, consisting of a treble casing with external piano-style keys or buttons and a bass casing (usually with buttons) attached to opposite sides of a hand-operated bellows....

...in Newfoundland, Canada, after the accidental death of his unfaithful wife. The Shipping News was awarded both a Pulitzer Prize and a National Book Award. Proulx’s next novel was Accordion Crimes (1996), which examines the immigrant experience by tracing the life of an Old World accordion in the United States....

Italian legal scholar and leading jurist of the 13th century who was responsible for the renovation of Roman law. He was the last of a series of legal glossators (annotators) of Justinian’s compilation of Roman law....

...have diversified into other types of marketing communications, including public relations, sales promotion, interactive media, and direct marketing. Agencies typically consist of four departments: account management, a creative division, a research group, and a media planning department. Those in account management act as liaisons between the client and the agency, ensuring that client needs......

...news of the use of ether in surgery reached Scotland in 1846, Simpson tried it in obstetrics the following January. Later that year he substituted chloroform for ether and published his classic Account of a New Anaesthetic Agent. Simpson persisted in the use of chloroform for relief of labour pains, against opposition from obstetricians and the clergy. He was appointed one of the......

In February 1768 Boswell published An Account of Corsica, The Journal of a Tour to That Island; and Memoirs of Pascal Paoli and stepped into fame. France had unmasked its intention of annexing the island, and people were greedy for information about Corsica and Paoli. Motives of propaganda caused him to present himself in the book as completely naive and to cut the tour......

...in An Essay Concerning Human Understanding; he did, however, agree with Locke in dismissing the doctrine of innate ideas (which asserts that humans hold their mental ideas at birth). Norris’ An Account of Reason and Faith in Relation to the Mysteries of Christianity (1697) was one of the best contemporary responses to Christianity Not Mysterious, by the...

Withering’s lasting reputation lies primarily with his publication An Account of the Foxglove, and Some of Its Medical Uses (1785). Though foxglove (Digitalis purpurea) had been used in folk medicine for centuries, Withering drew upon 156 of his own cases to objectively demonstrate its efficacy in treating dropsy, the edematous bodily swelling that.....

...The Rehearsal Transprosed (1672, with a sequel in 1673) and providing so vivid an exposition of Whig suspicions of the restored monarchy’s attraction to absolutism in An Account of the Growth of Popery, and Arbitrary Government in England (1677) that a reward of £100 was offered for revealing its author’s identity....

Sprat was the close friend and literary executor of Cowley, and his An Account of the Life and Writings of Mr. Abraham Cowley (1668) was the first biography of a writer attempting to show the interrelation between the poet’s life and personality and his works. Although he referred to the charm and interest of Cowley’s letters, he considered it an impropriety to publish them an...

...of a Dictionary of the English Language and signed a contract for A Dictionary of the English Language. His major publication of this period was An Account of the Life of Mr. Richard Savage, Son of the Earl Rivers (1744). If, as Johnson claimed, the best biographies were written by those who had eaten and drunk and “lived in....

...explorers. The first extensive contact of Palauans with Westerners took place after the shipwreck of the East India Company’s packet Antelope in 1783. George Keate’s An Account of the Pelew Islands (1788), which recounted the friendship and high adventure found in Palau, served to fuel the European myths of the noble savage and the island paradise. ...

...the prison reformer John Howard had, in 1786, deliberately sailed from Smyrna to Venice in a ship with a foul bill of health so that he could gain firsthand experience of lazarettos; his account (An Account of the Principal Lazarettos in Europe [1789]) presents a depressing picture....

Fothergill, a Quaker, studied medicine at the University of Edinburgh and later became a highly successful London practitioner. His “Account of the Sore Throat Attended with Ulcers” (1748) was the first authoritative paper on diphtheria. He also described facial neuralgia and migraine. Fothergill popularized the use of coffee in England and promoted its cultivation in the West......

...David Garrick, and wrote miscellaneous original dramatic works. His cocksure attitudes alienated many friends, including Dr. Johnson. He was commissioned by the British Admiralty to compile An Account of the Voyages Undertaken in the Southern Hemisphere (1773), dealing chiefly with the voyages of exploration of Captain James Cook; but the work was severely criticized for inaccuracy and.....

any amount owed by a company as the result of a purchase of goods or services from another company on a credit basis. Under a trade-credit arrangement, the purchasing company, after placing its order with the seller, receives the goods and an invoice denoting the price of the goods and the terms for payment. The purchasing firm does not send a trade acceptance or promissory note for payment but e...

any amount owed to a business by a customer as a result of a purchase of goods or services from it on a credit basis. The company making the sale does not receive an acceptance or promissory note (i.e., written orders or promises to pay) from the purchaser but merely enters the amount due as a current asset in its books. Accounts receivable constitute ...

principle according to which a person or institution is responsible for a set of duties and can be required to give an account of their fulfilment to an authority that is in a position to issue rewards or punishment. Despite the apparent precision of this definition, controversy has arisen about the exact meaning of accountability....

...are a listing of expenditures under various main headings—personnel, equipment, and supplies—and the total is approved through the political process. This type of budget is called an accountability budget because it accounts for defense expenditure, but it cannot inform the defense planner (or the taxpayer) how efficiently the defense department has spent the budget. Under......

Under constitutional government, those who govern are regularly accountable to at least a portion of the governed. In a constitutional democracy, this accountability is owed to the electorate by all persons in government. Accountability can be enforced through a great variety of regular procedures, including elections, systems of promotion and discipline, fiscal accounting, recall, and......

In addition, the assurance services of professionally certified accountants include all of the following: financial, compliance, and assurance audits; less-formal review of financial information; attestation about the reliability of another party’s written assertion; and other assurance services not strictly requiring formal audits (e.g., forward-looking information and quality assertions)....

systematic development and analysis of information about the economic affairs of an organization. This information may be used in a number of ways: by a firm’s managers to help them plan and control ongoing operations; by owners and legislative or regulatory bodies to help them appraise the organization’s performance and make decisions as to its future; by owners, ...

any amount owed by a company as the result of a purchase of goods or services from another company on a credit basis. Under a trade-credit arrangement, the purchasing company, after placing its order with the seller, receives the goods and an invoice denoting the price of the goods and the terms for payment. The purchasing firm does not send a trade acceptance or promissory note for payment but e...

any amount owed to a business by a customer as a result of a purchase of goods or services from it on a credit basis. The company making the sale does not receive an acceptance or promissory note (i.e., written orders or promises to pay) from the purchaser but merely enters the amount due as a current asset in its books. Accounts receivable constitute ...

capital and largest city of Ghana, on the Gulf of Guinea (an arm of the Atlantic Ocean). The city lies partly on a cliff, 25 to 40 feet (8 to 12 metres) high, and spreads northward over the undulating Accra plains. The area’s susceptibility to faulting is the cause of occasional earthquakes....

The southeastern corner of the country, between the Akwapim-Togo Ranges and the sea, consists of the gently rolling Accra Plains, which are underlain by some of the oldest Precambrian rocks known—mostly gneisses (coarse-grained rocks in which bands containing granular minerals alternate with bands containing micaceous minerals); in places they rise above the surface to form inselbergs......

Although crime labs are vitally important to the criminal justice system, many countries, including the United States, do not have a mandatory process for accreditation. The United States offers a system of voluntary accreditation administered by an arm of the American Society of Crime Lab Directors. That accreditation signifies that the lab meets certain minimum standards in physical plant,......

...the procedures offered. Among the major accreditation organizations for international hospitals are the Joint Commission International (JCI), a branch of the U.S.-based Joint Commission Resources; Accreditation Canada International; and the Australian Council on Healthcare Standards International. Those organizations charge fees to clients who want to have their facilities surveyed for......

The Earth is thought to have accreted from a cloud of ionized particles around the Sun. This gaseous matter condensed into small particles that coalesced to form a protoplanet, which in turn grew by the gravitational attraction of more particulates. Some of these particles had compositions similar to that of carbonaceous chondrite meteorites, which may contain up to 20 percent water. Heating of......

Coral islands created by accretion have developed from rubbly reef rock broken off from the reef by storms and waves and mixed with finer reef detritus. The exceptional conditions of cyclonic storms are sometimes sufficient to create reef-top shoals in a single event. Other material accumulates by more regular methods such as normal currents and wave action. Beaches develop around the shoal,......

a disklike flow of gas, plasma, dust, or particles around any astronomical object in which the material orbiting in the gravitational field of the object loses energy and angular momentum as it slowly spirals inward. In astrophysics, the term accretion refers to the growth in mass of any celestial...

a disklike flow of gas, plasma, dust, or particles around any astronomical object in which the material orbiting in the gravitational field of the object loses energy and angular momentum as it slowly spirals inward. In astrophysics, the term accretion refers to the growth in mass of any celestial...

...that most continental shields are bordered by belts of folded rocks of post-Precambrian age. One school of thought holds that Earth history can be interpreted in terms of the concept of continental accretion—i.e., that belts of successively younger rocks have undergone intense deformation in episodes of mountain building and have become welded onto the borders of the preexisting.....

...32 mm (0.16 and 1.26 inches) that was ejected during a volcanic explosion. Lapilli may consist of fresh magma, solid magma from a prior eruption, or basement rocks through which the eruption passed. Accretionary lapilli are pellets formed by the accretion of volcanic ash or dust around moisture droplets; as in hailstones formed of water, these volcanic “hailstones” may show......

...which sometimes breaks the ocean surface, as in the case of the Java Trench. Such a ridge is constructed from deformed sediments scraped off the top of the descending oceanic plate and is termed an accretionary prism. A line of explosive volcanoes, extruding (erupting) a lava that forms the volcanic rock andesite, is found on the overriding plate usually 100 km (about 60 miles) or so from the.....

...were sutured onto the Cordilleran belt of North America, forming what geologists refer to as allochthonous terranes (fragments of crust displaced from their site of origin). This process of “accretionary tectonics” (or obduction) created more than 50 terranes of various ages in the Cordilleran region, including the Sonomia and Golconda terranes of the northwestern United States,.....

...accurate measure of taxpaying ability depends on how income is defined. The only definition that has been found to be completely consistent and free from anomalies and capricious results is “accrued income,” which is the money value of the goods and services consumed by the taxpayer plus or minus any change in net worth during a given period of time. (Tax experts commonly call thi...

the processes of change in artifacts, customs, and beliefs that result from the contact of two or more cultures. The term is also used to refer to the results of such changes. Two major types of acculturation, incorporation and directed change, may be distinguished on the basis of the conditions under which cultural contact and change take place....

...and they primarily waste away by melting and runoff or by the breaking off of icebergs (calving). In order for a glacier to remain at a constant size, there must be a balance between income (accumulation) and outgo (ablation). If this mass balance is positive (more gain than loss), the glacier will grow; if it is negative, the glacier will shrink....

...to this theory, the expansion of collective knowledge and capabilities beyond a certain limit is possible only by specialization and differentiation. Growth of technical knowledge stimulates capital accumulation, which leads to rising production levels. Population growth also may be incorporated in this model of cumulative evolution: it is by the accumulation of collective technical knowledge.....

The porosity (volume of pore spaces) and permeability (capacity for transmitting fluids) of carrier and reservoir beds are important factors in the migration and accumulation of oil. Most petroleum accumulations have been found in clastic reservoirs (sandstones and siltstones). Next in number are the carbonate reservoirs (limestones and dolomites). Accumulations of petroleum also occur in......

Released from her Warsaw prison, she taught at the Social Democratic Party school in Berlin (1907–14), where she wrote Die Akkumulation des Kapitals (1913; The Accumulation of Capital). In this analysis, she described imperialism as the result of a dynamic capitalism’s expansion into underdeveloped areas of the world. It was during this time also that she began to agita...

Toxic accumulation is one of the reasons repetitive exposures of a chemical produce toxicity while a single exposure may not. In a hypothetical case, as depicted in Figure 2, a concentration of more than 100 milligrams per gram in a target tissue is required for chemical A to cause toxic injury. If chemical A is administered at a dose that does not produce toxic levels in the tissue and the......

In contrast to primary cells, which are discharged once and then discarded, storage batteries can be supplied with direct current (DC) of the correct polarity and recharged to or near their original energy content and power capability—i.e., they can repeatedly store electrical energy. In discharging, the difference in electrical potential (voltage) of a battery’s electrodes causes......

Accuracy is the degree of agreement between the experimental result and the true value. Precision is the degree of agreement among a series of measurements of the same quantity; it is a measure of the reproducibility of results rather than their correctness. Errors may be either systematic (determinant) or random (indeterminant). Systematic errors cause the results to vary from the correct......

Italian legal scholar and leading jurist of the 13th century who was responsible for the renovation of Roman law. He was the last of a series of legal glossators (annotators) of Justinian’s compilation of Roman law....

...verbs. It was close typologically to Greek, though the shapes of words were very, even surprisingly, different. The nominal and pronominal declension had seven cases: nominative, genitive, dative, accusative, ablative, instrumental, and locative. However, many of these forms overlapped so that usually only three or four different forms existed; e.g., žam ‘time’...

...agents often have unfettered access to a lab’s facilities, usually at no cost. That access has raised concerns about tampering with evidence or biased results in favour of the prosecution. Criminal defendants frequently have no access to those public forensic science services and must often rely on private laboratories to analyze evidence for them. Most jurisdictions have some provisions...

in law, the rights and privileges of a person accused of a crime, guaranteeing him a fair trial. These rights were initially (generally from the 18th century on) confined primarily to the actual trial itself, but in the second half of the 20th century many countries began to extend them to the periods before and after the trial....

...Portrait of Jennie (1948). The love story featured Jones and Cotten, and its supernatural twist was borrowed by subsequent films. In 1949 Dieterle directed The Accused, an entertaining film noir about a college professor (Loretta Young) on the run from a homicide detective (Wendell Corey) after she kills a student in self-defense. In the action....

...to learn about language. He drew upon his word counts and his “semantic counts” to determine inclusions. The new mode was carried on to the college level by Clarence L. Barnhart in The American College Dictionary (ACD), in 1947. (Barnhart also carried on Thorndike’s work in the Thorndike-Barnhart dictionaries after Thorndike’s death.) After ...

In most Western card games, the numeral 1 is designated ace and marked A accordingly. In games based on the superiority of one rank over another, such as most trick-taking games, the ace counts highest, outranking even the king. In games based on numerical value, the ace normally counts 1, as in cribbage, or 11, as an option in blackjack. In games based on arranging cards into ordered series,......

In 1945, the war being over, Turing was recruited to the National Physical Laboratory (NPL) in London to design and develop an electronic computer. His design for the Automatic Computing Engine (ACE) was the first relatively complete specification of an electronic stored-program general-purpose digital computer. Had Turing’s ACE been built as planned, it would have had considerably more mem...

...of a renal artery. Renin catalyzes the conversion of a plasma protein called angiotensinogen into a decapeptide (consisting of 10 amino acids) called angiotensin I. An enzyme in the serum called angiotensin-converting enzyme (ACE) then converts angiotensin I into an octapeptide (consisting of eight amino acids) called angiotensin II. Angiotensin II acts via specific receptors in the adrenal......

Any shot beyond an opponent’s reach is called a placement. The most effective placement is a kill, in which the ball rebounds at a height so low that it is impossible to return it. An ace is a legal serve that eludes the receiver. The greater variety of angle shots—for example, sidewall to front wall, ceiling to front, side to back—makes the four-wall game the most demanding f...

Ace in the Hole (originally titled The Big Carnival; 1951) was Wilder’s first endeavour as both producer and director, and it would prove to be his first box-office failure. This acerbic drama, a corrosive account of a tabloid reporter (Kirk Douglas) who amorally manipulates a mining tragedy in New Mexico to artificially extend its run on th...

...activation of AT1 receptors. Thus, it was assumed that drugs that inhibit ACE would lower blood pressure. This assumption turned out to be correct, and a class of antihypertensive drugs called ACE inhibitors was developed. Similarly, once the role of AT1 receptors in blood pressure maintenance was understood, it was assumed that drugs that could block AT1 receptors would produce......

...the television sketch comedy series In Living Color. The show ended in 1994, and Carrey concentrated on his film career. He scored an immediate hit with Ace Ventura: Pet Detective and had continued box-office success with Dumb and Dumber (1994) and The Mask (1994). In the latter film Carrey......

autonomous daerah istimewa (special district) of Indonesia, with the status of propinsi (or provinsi; province), forming the northern extremity of the island of Sumatra. Aceh is surrounded by water on three sides: the Indian Ocean...

one of the main ethnic groups on the island of Sumatra, Indonesia. They were estimated to number roughly 4.2 million in the early 21st century. They speak a language of the Austronesian (Malayo-Polynesian) family....

...languages include Cebuano, Tagalog, Ilocano, Hiligaynon, Bicol, Waray-Waray, Kapampangan, and Pangasinan of the Philippines; Malay, Javanese, Sundanese, Madurese, Minangkabau, the Batak languages, Acehnese, Balinese, and Buginese of western Indonesia; and Malagasy of Madagascar. Each of these languages has more than one million speakers. Javanese alone accounts for about one-quarter of all......

(1873–1904), an armed conflict between the Netherlands and the Muslim sultanate of Aceh (also spelled Acheh, or Atjeh) in northern Sumatra that resulted in Dutch conquest of the Acehnese and, ultimately, in Dutch domination of the entire region. In 1871 the Netherlands and Britain had signed a treaty that recognized...

The destruction of Nesa and its merchant colony marked the end of Assyrian trade not only there but also in other merchant colonies, such as Acemhöyük (probably the ancient Purushkhanda) and Hattusas (site of the later Hittite capital), which, together with a number of other cities in central Anatolia, were also violently destroyed. It is not clear who was responsible for the......

...In a number of moth families the females are wingless, although the males are fully winged (bagworm moths [family Psychidae], some tussock moths [family Lymantriidae]). In the aquatic snout moth (Acentropus) some females are wingless, while some females and males are winged. There are eight main wing veins, each with a characteristic pattern. These are usually designated according to the...

any of more than 15,000 species of clams, oysters, mussels, scallops, and other members of the phylum Mollusca characterized by a shell that is divided from front to back into left and right valves. The valves are connected to one another at a hinge. Primitive bivalves ingest sediment; however, in most species the respirat...

in prosody, a line of verse that is lacking the normal first syllable. An iambic line with only one syllable in the first foot is a headless line, as in the third line of the following stanza of A.E. Housman’s poem “To an Athlete Dying Young”:The time you won your town the raceWe chaired you through the market-pl...

(Acer), any of a large genus (about 200 species) of shrubs or trees in the family Sapindaceae, widely distributed in the North Temperate Zone but concentrated in China. Maples constitute one of the most important groups of ornamentals for planting in lawns, along streets, and in parks. They offer a great variety of form, size, and foliage; many display striking autumn colour. Several yield ...

Among the popular smaller maples the hedge, or field, maple (A. campestre) and Amur, or ginnala, maple (A. ginnala) are useful in screens or hedges; both have spectacular foliage in fall, the former yellow and the latter pink to scarlet. The Japanese maple (A. palmatum), developed over centuries of breeding, provides numerous attractive cultivated varieties with varying......

In one group of maples, the vertically striped silvery-white young bark provides an attractive winter landscaping feature. These trees are the striped maple (A. pennsylvanicum), the red snake-bark maple (A. capillipes), the Her’s maple (A. hersii), and the David’s maple (A. davidii). The chalk maple, with whitish bark, is sometimes classified as A. leuc...

Among the popular smaller maples the hedge, or field, maple (A. campestre) and Amur, or ginnala, maple (A. ginnala) are useful in screens or hedges; both have spectacular foliage in fall, the former yellow and the latter pink to scarlet. The Japanese maple (A. palmatum), developed over centuries of breeding, provides numerous attractive cultivated varieties with varying......

Large maples, usually in excess of 30 metres high, that are much planted for shade include the sugar (A. saccharum), silver (A. saccharinum), and red (A. rubrum) maples. The Oregon, or bigleaf, maple (A. macrophyllum) provides commercially valuable wood darker than that of other maples; it shows bright-orange fall foliage. The Sycamore maple (A.......

(Acer negundo), hardy and fast-growing tree, of the soapberry family (Sapindaceae), native to the central and eastern United States. Introduced to Europe, it is widely cultivated there as an ornamental. The tree grows to 9–15 m (30–50 feet) tall. The compound leaves (rare among maples) consist of three, five, or seven coarsely toothed leaflets. The single seed is borne in a ...

...(A. campestre) and Amur, or ginnala, maple (A. ginnala) are useful in screens or hedges; both have spectacular foliage in fall, the former yellow and the latter pink to scarlet. The Japanese maple (A. palmatum), developed over centuries of breeding, provides numerous attractive cultivated varieties with varying leaf shapes and colours, many useful in small gardens. The......

In one group of maples, the vertically striped silvery-white young bark provides an attractive winter landscaping feature. These trees are the striped maple (A. pennsylvanicum), the red snake-bark maple (A. capillipes), the Her’s maple (A. hersii), and the David’s maple (A. davidii). The chalk maple, with whitish bark, is sometimes classified as A. leuc...

The ash-leaved maple, or box elder, is a fast-growing tree of limited landscape use. The Norway maple (A. platanoides), a handsome, dense, round-headed tree, has spectacular greenish-yellow flower clusters in early spring; many cultivated varieties are available with unusual leaf colour (red, maroon, bronze, or purple) and growth form (columnar, globular, or pyramidal)....

...red (A. rubrum) maples. The Oregon, or bigleaf, maple (A. macrophyllum) provides commercially valuable wood darker than that of other maples; it shows bright-orange fall foliage. The Sycamore maple (A. pseudoplatanus), an important shade and timber tree in Europe, has many ornamental varieties....